Temperature-insensitive strain sensor based on four-wave mixing using Raman fiber Bragg grating laser sensor with cooperative Rayleigh scattering

• Type: Article in International Scientific Journal
• Date: 2011

Authors

martins, hf (Author) Other; marques, mb (Author) FCUP; frazao, o (Author) Other

Journal

Title: Applied Physics B: Lasers and Optics

Vol. 104

Pages: 957-960

ISSN: 0946-2171

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 19 Citations

Scopus - 23 Citations

Other information

Authenticus ID: P-002-MT8

DOI: 10.1007/s00340-011-4516-1

Abstract (EN): A temperature-insensitive strain sensor based on Four-Wave Mixing (FWM) using two Raman fiber Bragg grating (FBG) lasers with cooperative Rayleigh scattering is proposed. Two FBG were used to form two linear cavities laser sensors based on Raman amplification combined with cooperative Rayleigh scattering. Due to the very low dispersion coefficient of the fiber, it is possible to obtain the FWM using the two lasers. This configuration allows the operation as a temperature-insensitive strain sensor where both sensors have the same sensitivity to temperature but only one of the FBG laser is sensitive to strain. The difference between the wavelengths of the signal sensor and the converted signal presents a strain coefficient sensitivity of 2 pm/mu epsilon with insensitivity to temperature. The FWM efficiency is also dependent on the applied strain, but it is temperature independent, presenting a maximum sensibility of 0.01 dB/mu epsilon.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4